Burglar-alarm



l(No Model.)

2 Sheets-Sheet 1. S. BROIGHGANS.

BURGLAR ALARM.

No.' 430,373. Patented June 17, 1890.

. 2 ShBetB-Shet 2.

S. BROICHGANS.

No Model.)

BURGLAP. ALARM.

No. 430,373. Patented'June 17, 1890.

@www1/VOM' @3% @WoW/ay Nirnn STATES ATENT OFFICE.

STEPHAN BROICHGANS, OF MILWAUKEE, VISCONSIN.

BU RG'LAR-ALARNI.

SPECIFICATION forming part of Letters Patent No. 430,373, dated June 1'7, 1890.

Serial No. 344,706. (No model.)

To all whom t may concern.-

Be it known that I, STEPHAN BRoIoHGANs, of Milwaukee, in the county of Milwaukee, and in the State of lVisconsin, have invented certain new and useful Improvements in Burg` lar-Alarms; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to burglar-alarms; and it consists in certain peculiarities of construc` tion, as will be fully set forth hereinafter, and subsequently claimed.

In the drawings, Figure l is a rear elevation of my device with parts broken away or in section. Fig. 2 is a vertical transverse section on the line 2 2 of Fig. l. Fig. 3 is a vert-ical section on the line 1 l of Fig. 2, showing also electrical connections with a window; and Fig. et is a detail view showing the manner ot attachment of one of the revolvers. Fig. 5 is a detail view of the cam-edge flanged plate and its shaft.

My presentinvention is an improvement on that class of devices shown in my prior Patent No. 32l,679,dated July 7, 1885, wherein a firearm is discharged when a door or window connected with the alarm is opened; but in my present device the connection between said door and window and said alarm is an electrical one, the opening of the door or Window serving to make Contact and close an electric circuit, and thereby automatically release a detent and permit my device to operate.

A is the front plate of my device, which plate is provided with a seriesof perforations a, preferably four in number, located at the corners of a supposed square. B is the back plate, provided with a like number of perforations similarly arranged, and having, preferably, surrounding sockets b on the inner side, said sockets Z) and perforations a being' designed to receive the barrels C of self-cooking revolversD, two of which are inserted, lying' sidewise, with their handles pointing in opposite directions, one in ordinary position, and the fourth one inverted, as clearly indicatedA by the relative positions of the feathers c, normally on the tops of the revolver-barrels, so that each revolver-trigger (which is extended into a lever-arm d) shall point in a different direction, but continuously around the square outlined by the perforations ct back of the back plate B, on the rear face of which are vprojecting lugs, to which are pivoted arms forming double toggle-levers for operating the triggerA lever-arms d, as hereinafter described, the said back plate being further provided with L -shaped slots L, continuously grouped around its central part to receive the cam-pinsE and their arms e, connected to said double toggle-levers.

The two plates A and B are connected by a series of posts F F F and screws or screw-bolts f, like a clock-frame, and at their upper parts by the spring-shaft G, which receives the hub of the gear-wheel H, to which the casing I of the springt' is secured, (said wheel H forming one wall of said casing,) the adjacent end of said shaft G projecting through the plate A and being squared, as shown at g, to receive a winding-key, and on the other side of this casing I this shaft G carries a ratchet-wheel h for engagement with a pawl J, pivoted to a pin on the inner face of the back plate B, as shown in dotted lines in Fig. l, and held against said ratchet-wheel by a spring The plates A B are provided with central sockets k k for a shaft K, which has secured to it the hub in of a plate havinga peripheral flange M, with a cam-edge for engagement with the cam-pins E, already named. On the other side of said plate is a gear-wheel N, whose teeth mesh with those of the gear-wheel H on the shaft G above, and next this wheelv N, on vthe same shaft K, is an escapementwheel O, the cam-plate M, wheel N, and wheel O being all connected rigidly togetherby pins n n, and the motion of the wheel O being governed by the pallets of an ordinary escapement o, pivoted at p to the plate A and having a weighted pendulum P depending therefrom.

Q Q represent electromagnets suitably supported between the plates A B on a frame q, and R is a lever pivoted at r, the upper end of which ends in a detent s, which may be held normally (as by spring s', pivoted at s to the plate A or by gravity) in engagement with the teeth of the gear-wheel N, and the lower end of which terminates in an arma- IOO ture S, projecting adjacent to the ends of the magnets Q Q and Within their ield of magnetic attraction When they are energized.

The double toggle-levers hereinbefore. referred to are all exactly alike, save in location, that being arranged to conform to the location of the trigger lever-arm d, withV which each engages, said device comprising a straight link t, arm T, having a curved end pivoted to said link t, and a Y-shaped part comprising a straight stem u, an oblique arm U, pivoted to the straight end of the arm T, and an oblique cam-pin arm e, terminating in a cam-pin E, projecting at right angles therefrom, (the parts e E having already been referred to,) and thelinks t and stems u of the said double toggle-levers being pivoted to lugs V fu, respectively, on the rear of. the back plate B.

The operation of my device will be readily understood from the foregoing description of its construction, taken in connection with the accompanying drawings. The revolvers are all loaded, preferably with blank cartridges, (the object being chieiiy to create an alarm and make a noise,) and placed in proper position, the spring L' wound up, and the detente caught in the toothed periphery of the Wheel N. The device may be secured at any convenient point, preferably adjacent to the door or Window which it is sought to guard.

W w represent the upper and lower sash` of a Window. each having metallic contactpieces secured thereto of any approved construction, (such as the fork X and tongue 95,) so that when the window is closed these parts 4will not be in contact, but the slightest movement of either sash being sufficient to bring them into contact, said contact-pieces being connected by Wires Y y with the electro-magnets Q Q and with an electric battery Z', so that the moment contact between the pieces X is made, as described, the magnets Q Q are energized and the armature S on the end of lever R attracted thereto, thereby Withdrawing the detent s on the other end of said lever R from engagement With the toothed rim ot wheel N and permitting the spring c' to set the train of gearing in motion, as a result of which the cam-hanged plate M isrevolved on its shaft K, (through the gears I'I N,) and this cam-flange, acting on the campins E, operates the double toggle-levers e u U T-t, and the arms T thereof` in turn successively actuate the trigger lever-arm d of the revolvers D, thereby successively firing said revolvers until all the cartridges are exploded. Of course, if desired in any instance, the device may be set in such position that, being loaded With ball-cartridges, it will be a real battery instead of a mere alarm, this being merely a mat-ter of location and judgment, and the device can be stopped at any time by breaking the circuit and permitting the detent s to again engage with the Wheel N.

Though shown with a Window, it Will be understood that my device may be as easily electrically connected to a door. If desired, a bell-ringing devicemay be also attached, practically as in my said prior patent, hereinbefore referred to.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a burglaralarm, the combination, With a suitable supporting-frame, a spring `and its casing supported on a shaft in said frame, and a gear-Wheel on said shaft, of a lower shaft carrying a plate having a camedged iiange, a gear-Wheel in mesh with the one above, and an escapement-Wheel, an escapement connected to a Weighted pendulum, an electro-magnet electrically connected to the door or Window to be protected, a pivoted lever having a detent for one of the gear-Wheels at one end and an armature at the other end, and a double toggle-lever for operating the alarm pivoted to said frame and having an arm or pin for engagement with said cam-edged flange, substantially as set forth.

2. In a burglar-alarm, the combination, with a suitable supporting-frame and a series of lire-arms supported therein, of a shaft carrying a spring-casing, a gear-Wheel, and a ratchet-Wheel, a spring in said casing, a pawl on said frame in engagement With said ratchetfwheel, another shaft carrying a plate having a cam-edged flange, a gear-Wheel, and an escapement-wheel, all rigidly secured together, said gear-Wheel being in mesh with the one on the other shaft, an escapement connect-ed to a Weighted pendulum, magnets electrically connected to the door or window to be protected, a pivoted lever having a detent for one of said gear-Wheels at one end and an armature at its other end, and a series of double toggle-levers pivoted to said frame and having projecting arms with pins lying in the path of the said cam-edged flange, said levers being in contact with the trig- IOC IIO

gers of said lire-arms, substantially as set forth.

3. In a burglar-alarm, the combination, with a suitable supporting-frame and a rearm supported therein, of a double togglelever in contact with the trigger of said firearm, a train of gearing, and a cam-plate connected thereto for operating said lever, a lever having a detent at one end in engagement with said gearing and an armature at its other end, an electro-magnet adjacent to said armature, and a battery electrically connected to said magnet for energizing the latter and thereby freeing the detent at the proper time, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in

' the county of Milwaukee and State of Wisconsin, in the presence of two Witnesses.

STEPHAN BROIOHGANS. Witnesses:

H. G. UNDERWOOD,

KLUG. 

